Golf ball bulb led bulb energy rating a power 35 watt energy consumption 54 kwh1000h series osram led star classic p equivalent to light bulb 25 w socket e14 voltage 230 v light colour warm white light output 250 lumen colour temperature 2 700 k lifespan 15 000 h bulb shape golf ball style glass bulb variable intensity not dimmable mercury free colour rendering index ra 80 ra length 78 mm diameter 45 mm average annual electricity cost